2009 A6 parasitic battery drain

   #1  

TurkeyCreedDad

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Hello all, I have strange issue that I cannot seem to get any good help on. This is a 2009 Audi A6 3.0T V-6 that is in really pretty good shape, minus one major problem.... it's always dead. After a day or two, the voltage on the battery will drop as low as 9V requiring a charge (after climbing into the trunk to pop the damn latch.)

This issue has been happening for over 6 months now and I have thrown everything, including the kitchen sink at it. Below is a laundry list of things that we have tried to resolve the issue. Any further suggestions would be very welcomed at this point.
  • New battery installed and configured
  • Tested each fuse with a multimeter for unusual voltage
  • Removed the battery from the keyfob during a series long tests, after reading that someone found theirs was randomly checking in overnight
  • Tested voltage with multimeter connected in series with the battery overnight
  • Discovered that the Navigation DVD receiver in the trunk always has a red LED indicator on even after it appears to have gone into deep sleep. Therefore, we have tested it for days without that fuse and the problem continues
  • Left it with our local Audi dealer for 3 months and they found zero issues that could be the culprit. They had a few hunches and some suggestions to fix it but nothing ever has.
  • The last thing the dealer tried was replacing the heater control unit. They said they had no scientific proof why that might help, but it 100% fixed two other Audi's of this generation, with this similar elusive problem.
I have not pulled a recent auto-scan since getting it back from the shop, but prior to that, the only issue reported was that of the HomeLink garage door opener was not working.

I am about to run this car into the nearest lake if I cannot come up something that keeps it from dyeing ever couple days.

Thoughts?
 
   #2  

EuroX

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Auto scan please. Also is there any aftermarket equipment installed in the vehicle like dash cam, or any sort of retrofit?? Also does this vehicle have a sunroof?? is the bluetooth working??
 
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TurkeyCreedDad

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Thank you. I will run a new auto scan tomorrow AM and post it. I believe it is completely stock with nothing retro fitted, but I have only owned about 8 months. It does have a sun roof that seems to work just fine. And the Bluetooth connects to my iPhone for hands free calling ok.
 
   #4  

EuroX

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I think Auto scan if your best bet. I still can't believe a audi dealer cannot figure this simple issue out. Its gonna be time to perform a draw test and start pulling fuses.
 
   #5  

Bruce

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As an electrical guy, if this were mine to resolve, I would use a clamp on ammeter to monitor current in the vehicle flowing from the positive terminal. Yep we want to see it all!

I would start by removing every fuse. The ammeter should show 0 draw. If it doesn't then you have a short somewhere that needs to be found.

Then I would begin adding fuses and powering control modules one at a time. Each time I did this, I would let the vehicle sit to be sure the module went to sleep. Eventually, I would expect to find a module that draws significant current and does not shut down. That would then tell me the module I need to go investigate.

Mind, I know that doing things this way will confuse the crap out of all the electronics in the car. It will take a lot of work to get everything back on line and calibrated. But frankly, unless the autoscan points to a module that needs investigating, I don't think there is another way to go at this. Parasitic draws are never easy to resolve.

That's my 2 cents.. its worth what you pay! ;)
 
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-Uwe-
 
   #7  

EuroX

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Open all the doors hood and trunk and latch all the latches. Let it go to sleep and watch the multi meter or whatever your using to measure draw. Then start pulling fuses one by one and watch for the draw to disappear. A draw of 0.030ma is acceptable on these cars.
 
   #8  

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All above great suggestions! Here is another.

I had a relay stuck and I actually found it somewhat by accident: it was very warm all the time! So, there are many ways to test Relays, but a couple of quick ways is temperature , either with a instrument or try by touch (if it's closed and drawing, it will be nice and warm!) . Place a battery charger on the car and have a look , and touch, be sure all accessories are off. You may even be able to feel it humming. Two days, or so is quite a draw (for that battery).

Here is another weird one I once had: check all the 12V outlets "cigarette lighters" etc. and be sure a coin, staple, paper clip is not in the socket! :D
 
   #9  

EuroX

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All above great suggestions! Here is another.

I had a relay stuck and I actually found it somewhat by accident: it was very warm all the time! So, there are many ways to test Relays, but a couple of quick ways is temperature , either with a instrument or try by touch (if it's closed and drawing, it will be nice and warm!) . Place a battery charger on the car and have a look , and touch, be sure all accessories are off. You may even be able to feel it humming. Two days, or so is quite a draw (for that battery).

Here is another weird one I once had: check all the 12V outlets "cigarette lighters" etc. and be sure a coin, staple, paper clip is not in the socket! :D
A FLIR camera is always a great tool to test or look for possible issues. However not cheap for the average consumer, however handy for a number of things and In my opinion something every homeowner should have either way.
 
   #10  

TurkeyCreedDad

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Here is the autoscan:

Code:
Thursday,11,August,2022,13:48:42:31989
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 22.3.1.4 (x64)  HEX-V2 CB: 0.4615.4
Data version: 20220407 DS337.0
www.Ross-Tech.com


VIN: WAUWG74F29N056516   License Plate:


Chassis Type: 4F-AU56 (4F0)
Scan: 01 02 03 05 07 08 09 0E 0F 15 16 17 19 1E 36 37 42 46 47 4C
          4F 52 53 55 56 62 67 6C 72 77

VIN: WAUWG74F29N056516   Mileage: 275800km-171374miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
07-Control Head -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
0E-Media Player 1 -- Status: OK 0000
0F-Digital Radio -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
1E-Media Player 2 -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
37-Navigation -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: OK 0000
4C-Tire Pressure II -- Status: OK 0000
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
67-Voice Control -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (CCA)       Labels:. 06E-907-551-CAJ.clb
   Part No SW: 4F1 910 551 A    HW: 4F1 907 551
   Component: 3.0l V6 TFSI        0080 
   Revision: --H02---    Serial number:              
   Coding: 0105000A190F0120
   Shop #: WSC 20470 003 1048576
   VCID: 211FEB971DCE2553E01-8074
   VINID: 9D19675C7116089780146141189517D058

No fault code found.
Readiness: 1110 1101

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 09L-927-760.lbl
   Part No SW: 4F1 910 156 K    HW: 09L 927 156 C
   Component: AG6 09L 3,0TFSI USA 0040 
   Revision: --H04---    Serial number:        4517693
   Coding: 0000002
   Shop #: WSC 02325 785 00200
   VCID: 2C010AA36A0CF83B437-8078

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 4F0-910-517.clb
   Part No SW: 4F0 910 517 AL    HW: 4F0 614 517 BA
   Component: ESP8 quattro    H03 0060 
   Revision: 00000000    Serial number: 00000000000000
   Coding: 0020921
   Shop #: WSC 02325 785 00200
   VCID: 6E85C0AB9C90CA2B2D3-803A

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth.        Labels:. 4F0-910-852.clb
   Part No SW: 4F0 910 852 B    HW: 4F0 905 852 E
   Component: FBSAUDIC6 ELV   H05 0100 
   Revision: 00H05000    Serial number: 10602501293441
   Coding: 0000007
   Shop #: WSC 41425 002 1048576
   VCID: 2517FF8709E6C9739C9-8070

   Subsystem 1 - Part No: 4F0 910 132 L
   Component: FBSAUDIC6 EZS   H03 0020

   Subsystem 2 - Part No: 4F0 910 335 B
   Component: FBSAUDIC6 KSG   H03 0020

No fault code found.

-------------------------------------------------------------------------------
Address 07: Control Head        Labels: 4F0-910-7xx-07-H.clb
   Part No SW: 4F0 910 732 R    HW: 4E0 035 729 A
   Component: Interfacebox    H43 4610 
   Revision: 00000000    Serial number: 361DM097526601
   Coding: 0000003
   Shop #: WSC 02335 785 00200
   VCID: 323D14DB4828AECB09B-8066

   Subsystem 1 - Part No: 4F0 910 609 E
   Component: Bedienteil MMIC6H01 0060

   Subsystem 2 - Serial number: 00000001289115

   Subsystem 3 - Serial number: 0130.03.090000000100010743ÿ

   Subsystem 4 - Serial number: 010743ÿ

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 4F0-910-043.clb
   Part No SW: 4F0 910 043 A    HW: 4F1 820 043 AG
   Component: KLIMABETAETIGUNGH30 0020 
   Revision: 00000052    Serial number: 00000030257248
   Coding: 0524326
   Shop #: WSC 18192 004 1048576
   VCID: 1C61DA633AAC08BB337-8048

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 4F0-910-279.lbl
   Part No SW: 4F0 910 279 M    HW: 4F0 907 279 A
   Component: ILM Fahrer      H22 0320 
   Revision: 00000000    Serial number: 4F0907279    
   Coding: 0133123
   Shop #: WSC 02335 785 00200
   VCID: 333311DFB732A7C302D-8066

   Subsystem 1 - Part No: 4F1 910 113 D  Labels: 1KX-955-119.CLB
   Component: Wischer AudiC6  H10 0040 
   Coding: 00056595
   Shop #: WSC 02335 

   Subsystem 2 - Part No: 8K0 910 557   Labels: 8K0-955-559.CLB
   Component: REGENLICHTSENSORH04 0003 
   Coding: 00146221
   Shop #: WSC 02335 

No fault code found.

-------------------------------------------------------------------------------
Address 0E: Media Player 1 (R199)       Labels:. 4E0-035-785.lbl
   Part No SW: 4E0 035 785 F    HW: 4E0 035 785 C
   Component: SG ext.Player H20 0850 
   Revision: 00000000   
   Coding: 010000
   Shop #: WSC 00000 000 00000
   VCID: 2B0309BF6302FF034AD-807E

No fault code found.

-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 4E0-910-593-SIR.lbl
   Part No SW: 4E0 910 593 M    HW: 4E0 035 593 F
   Component: SDAR SIRIUS     H07 0160 
   Revision: 00000000    Serial number: AUZ4Z7I0535713
   Coding: 0000100
   Shop #: WSC 02323 785 00200
   VCID: 313F1BD74D2E95D3701-8064

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 4F0-910-655-10.clb
   Part No SW: 4F0 910 655 M    HW: 4F0 959 655 F
   Component: Airbag AU1042 H06 0090 
   Revision: --------    Serial number: 003CJ0016AMU
   Coding: 303142373034303030314A55304C34463053
   Shop #: WSC 02323 785 00200
   ASAM Dataset: EV_Airba10AURB4 001001
   ROD: EV_Airba10AURB4.rod
   VCID: 313F1BD741AE95D3701-8064

   Seat occupied recognition:
   Subsystem 1 - Part No SW: 4F0 910 339 B    HW: 4F0 959 339 B
   Component: BF-Gewichtss.  H03  0060
   Serial number: 5810000R0000003C61
   Coding: 000000

   Crash sensor for side airbag: driver side:
   Serial number: 3574SRB400008BC0E9BP

   Front Passenger's Side Airbag Crash Sensor:
   Serial number: 3584SRB400008BE0727A

   Rear Side Airbag Crash Sensor (on driver's side):
   Serial number: 35152RB402D85LSJ3JMQ

   Passenger side rear thorax airbag crash sensor:
   Serial number: 35252RB402185LSJ1S44

   Crash sensor for front airbag: driver side:
   Serial number: 3554NRB400004B2AAD58

   Crash sensor for front airbag: front passenger side:
   Serial number: 3564NRB400004B17F552

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 4F0-910-549.lbl
   Part No SW: 4F0 910 549 A    HW: 4F0 953 549 D
   Component: J0527               0530 
   Revision: 00H05000    Serial number: 90055090830142
   Coding: 0012141
   Shop #: WSC 02323 785 00200
   VCID: 270BF58F73EADB63AE5-8072

   Subsystem 1 - Part No: XXXXXXXXXXX
   Component: E0221           H02 0030

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:. 4F0-920-xxx-17.clb
   Part No SW: 4F0 920 983 C    HW: 4F0 920 983 C
   Component: KOMBIINSTR.   H06 0135 
   Revision: 00200000    Serial number: AEA21EZ39    
   Coding: 8B9F0A050B00CF05020201
   Shop #: WSC 02391 823 56573
   VCID: 2C010AA3660CF83B437-8078

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 4F0-907-468.clb
   Part No SW: 4F0 907 468 K    HW: 4F0 907 468 F
   Component: GW-BEM 4CAN-M H06 0025 
   Revision: 4LA80024    Serial number: 2400L0940181AD
   Coding: 000303
   Shop #: WSC 02391 823 56573
   VCID: 372B25CFAF4A4BE33E5-8062

   Subsystem 1 - Part No SW: 8K0 915 181 C    HW: 8K0 915 181 C
   Component: J367-BDM  H07 0107
   Serial number: 00000000004140482616

No fault code found.

-------------------------------------------------------------------------------
Address 1E: Media Player 2        Labels: 4E0-910-111.lbl
   Part No SW: 4E0 910 110 E    HW: 4E0 035 110 A
   Component: MP3-Changer     H47 0390 
   Revision: 00047003    Serial number: AUZ5ZBI8781609
   Shop #: WSC 00000 000 00000
   VCID: 1A6DDC7B3098768B21B-804E

No fault code found.

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr (J136)       Labels: None
   Part No SW: 4F0 959 760 C    HW: 4F0 959 760 C
   Component: MEM-FS        H08 0062 
   Revision: AA000000    Serial number: 00001001258838
   Coding: 00581B00004011110000
   Shop #: WSC 02391 823 56573
   VCID: 313F1BD7412E95D3701-8064

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation        Labels: 4E0-910-88x-37.lbl
   Part No SW: 4E0 910 888 M    HW: 4E0 919 887 M
   Component: MNS US          H51 1100 
   Revision: 00000000    Serial number: 395BT087510395
   Shop #: WSC 08316 444 56725
   VCID: 382926F3AE54449B37F-806C

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:. 4F0-959-793.clb
   Part No SW: 4F0 959 793 R    HW: 8K0 959 793 D
   Component: TSG FA        H11 0250 
   Revision:             Serial number: 0000100926937
   Coding: 011F57204E40410001
   Shop #: WSC 02391 823 56573
   VCID: 46D5580BD8A0226BB53-8012

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 4F0-910-289.lbl
   Part No SW: 4F0 910 289 N    HW: 4F0 907 289 N
   Component: Komfortgeraet   H28 0240 
   Revision: 02400028    Serial number: 01177792180000
   Coding: 4618269
   Shop #: WSC 02335 785 00200
   VCID: 35372FC7B946B9F32C9-8060

   Subsystem 1 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HORN H03 1301

2 Faults Found:
01134 - Alarm Horn (H12)
            012 - Electrical Fault in Circuit
             Freeze Frame:
                    Fault Status: 01101100
                    Fault Priority: 3
                    Fault Frequency: 254
                    Reset counter: 219
                    Mileage: 226626 km
                    Time Indication: 0
                    Date: 2018.03.12
                    Time: 16:16:42

02742 - Bulb for Brake/Turn Signal Light; Left
            009 - Open or Short to Ground
             Freeze Frame:
                    Fault Status: 01101001
                    Fault Priority: 3
                    Fault Frequency: 11
                    Reset counter: 153
                    Mileage: 273740 km
                    Time Indication: 0
                    Date: 2008.08.13
                    Time: 05:55:21


-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 4F0-910-223-BO.lbl
   Part No SW: 4F0 910 223 J    HW: 4F0 035 223 G
   Component: DSP-High C6     H10 0240 
   Revision: PROD_01     Serial number: 00000000143616
   Coding: 0000026
   Shop #: WSC 02323 785 00200
   VCID: 2517FF8709E6C9739C9-8070

No fault code found.

-------------------------------------------------------------------------------
Address 4C: Tire Pressure II        Labels: 4F0-910-274.clb
   Part No SW: 4F0 910 274 A    HW: 4F0 907 274
   Component: J793  RKA+      H02 0100 
   Revision: 00000506    Serial number: 00005060040976
   Coding: 0623301
   Shop #: WSC 02323 785 00200
   VCID: 221DE49B18C83E4BF9B-8076

No fault code found.

-------------------------------------------------------------------------------
Address 4F: Centr. Electr. II        Labels: 4F0-910-280.lbl
   Part No SW: 4F0 910 280     HW: 4F0 907 280 C
   Component: ILM Beifahrer   H13 0100 
   Revision:             Serial number: 00000000367301
   Coding: 0002014
   Shop #: WSC 02323 785 00200
   VCID: 5EE5906B6C305AAB9D3-800A

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:. 4F0-959-792.clb
   Part No SW: 4F0 959 792 R    HW: 8K0 959 792 D
   Component: TSG BF        H11 0250 
   Revision:             Serial number: 0000100931087
   Coding: 011F57204E40410001
   Shop #: WSC 02391 823 56573
   VCID: 45D75F07E5A62973BC9-8010

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake        Labels: 4F0-910-801.clb
   Part No SW: 4F0 910 801 D    HW: 4F0 907 801 B
   Component: EPB  CEFC0090   H05 0090 
   Revision: --H05---   
   Coding: 0000222
   Shop #: WSC 02145 785 00200
   VCID: 211FEB971DCE2553E01-8074

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range        Labels: 4F0-910-357.lbl
   Part No SW: 4L0 910 357     HW: 4L0 907 357
   Component: AFS 1           H01 0050 
   Revision: 00000001    Serial number:              
   Coding: 0000026
   Shop #: WSC 02325 785 00200
   VCID: 698FB3B7A57E2D13781-803C

   Subsystem 1 - Part No: 4F0 941 329 D
   Component: AFS-Modul links H01 0010

   Subsystem 2 - Part No: 4F0 941 329 D
   Component: AFS-Modul rechtsH01 0010

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 4E0-910-541.lbl
   Part No SW: 4E0 910 541 T    HW: 4F0 035 541 N
   Component: TUNER EU/US/RDW H42 0630 
   Revision: 00000000    Serial number: 379I+087532583
   Coding: 0000002
   Shop #: WSC 02135 785 00200
   VCID: 313F1BD74D2E95D3701-8064

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels:. 4F0-959-795.clb
   Part No SW: 4F0 959 795 M    HW: 8K0 959 795 B
   Component: TSG HL        H10 0251 
   Revision:             Serial number: 0000100864847
   Coding: 010E57204040220001
   Shop #: WSC 02391 823 56573
   VCID: 43D3411FEB92174392D-8016

No fault code found.

-------------------------------------------------------------------------------
Address 67: Voice Control        Labels: 4E0-910-75x-67.lbl
   Part No SW: 4E0 910 754 Q    HW: 4E0 035 753 A
   Component: SDS 3501 US     H46 0630 
   Revision: 00000000    Serial number: 00000903110228
   Shop #: WSC 12336 024 394758
   VCID: 343112C3B23CA0FB1B7-8060

No fault code found.

-------------------------------------------------------------------------------
Address 6C: Back-up Cam.        Labels: 4L0-910-441.clb
   Part No SW: 4F0 910 441 D    HW: 4L0 907 441 B
   Component: J772__Rearview      0030 
   Revision: --H03---    Serial number: 525PA8-J8Z23OF
   Coding: 1000304
   Shop #: WSC 02145 785 00200
   VCID: 211FEB971DCE2553E01-8074

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels:. 4F0-959-795.clb
   Part No SW: 4F0 959 795 M    HW: 8K0 959 795 B
   Component: TSG HR        H10 0251 
   Revision:             Serial number: 0000100918099
   Coding: 010E57204040220001
   Shop #: WSC 02391 823 56573
   VCID: 43D3411FEB92174392D-8016

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 4E0-910-336.lbl
   Part No SW: 4F0 910 336 H    HW: 4E0 862 335
   Component: Handyvorb2      H20 1130 
   Revision: 00000000    Serial number: 00000005085541
   Coding: 0010900
   Shop #: WSC 02335 785 00200
   VCID: 2809F6B37EF4D41BA7F-807C

No fault code found.

End----(Elapsed Time: 02:09, VBatt start/end: 11.9V/11.9V. VIgn 11.9V)-----
 
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   #13  

TurkeyCreedDad

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I had this on a 2007 Audi A4, siren dead internal battery and still drawing power to recharged it.
Once I disconnected the siren the power drain ceased.
Souriau, thank you. Did you disconnect the siren horn itself under the hood or is there a fuse? I don't remember seeing one for the latter.
 
   #15  

Morski

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You can buy a small tester made by Sealey tools and possibly others that has probes you use to touch the 2 point on the fuse without having to remove the fuse itself and then wake the module back up when its reinserted. Really useful tool. Displays shows current draw across the fuse.
 
   #16  

TurkeyCreedDad

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I think I finally have something tangible to troubleshoot now. After letting the car sit with everything powered down (the doors, trunk and hood open, but all latched) for 3 hours, I tested each fuse.

I found in the passenger-side top-black fuse panel that #10 (10A) still registered 6mV and #12 (5A) was at 10mV. From my calculations using the matrix in the video, that totals about a 2A draw.

Both #10 and #12 are listed as Communication on the inside of the fuse compartment. But Google says #10 is Communication/MMI.

I am thinking about trying the loopback trick on the Sirius receiver next but I will have to get one ordered.
 
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Uwe

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Both #10 and #12 are listed as Communication on the inside of the fuse compartment. But Google says #10 is Communication/MMI.
I might suggest consulting a proper wiring diagram for your specific car to determine exactly what gets power from those fuses.

-Uwe-
 
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Uwe

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You can buy a small tester made by Sealey tools and possibly others that has probes you use to touch the 2 point on the fuse without having to remove the fuse itself and then wake the module back up when its reinserted. Really useful tool. Displays shows current draw across the fuse.
Sounds like this tool is a volt meter that does the Ohm's Law arithmetic for you?

-Uwe-
 
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EuroX

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Attached is a voltage drop chart calculator when using a DVOM to find a draw, chart comes in handy you can find out how much draw you have based on Mv readings taken with the DVOM. Comes in handy when you don't have a amp clamp. As far as your draw goes, I don't think that's your issue. According to what I see those fuses are always powered by terminal 30(aka always hot). I think you need to look else where, there is a few fuse panels in this vehicle including in the trunk and 2 ebox panels under the hood as well. Attached is also what the fuses power but as you can see it looks like 1 fuse is a higher value than listed perhaps there's something there if correct fuse is installed and the fuse pops perhaps you have a bad module?? J794 is the 5F module, these are notorious for going bad as well as staying on if anything is spilled on E380 aka mmi control buttons. If those buttons are sticking expect a draw as the 5F will never go to sleep. The other fuse shows dvd player and cd changer depending on equipment, chances are you have cd changer in glovebox, this is only on most bus iirc so could be related and not going to sleep but again terminal 30 is always powered. I would put the right fuse in, inspect the mmi buttons or possibly unplug and retest. If nothing is found you need to search further.

I suspect possibly something with the MMI system causing a draw but anything is possible. I have seen satellite radio modules cause as draw even amps as well which is common but again anything is possible,hell I've seen a telephone module filled with water in the drivers floor depending on model year cause a draw as well.
fuses.png
 

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   #20  

TurkeyCreedDad

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Eurox, I do have a AC/DC amp clamp. It has been really handy.

Thank you so much for all the great ideas. I will get that fuse corrected ASAP.

Regarding the head unit of mmi, there are 2 buttons that are super sticky.

Sounds like I have some work to do today. I will post back soon. Thanks again.
 
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